challenger Synonyms

contender adversary competitor rival opponent medalist petitioner interloper paynim oppugner intruder kindler oppugnant oppositionist opposer litigant objector nominee newcomer nemesis meddler player polemist pretender attacking party unopposed semifinalist quarreller contester scrapper dark horse duelling resistor troublemaker cinderella upstart tilter resister questioner protester impugner impeacher contestant confronter competitress competition combatant claimer citer candidate